#171 - move running rspec into a seperate rake task.
Had to migrate buildr dependent code to plain ruby.
Introduced old.go.jruby & old.go.jruby.bat on the lines of go.jruby & go.jruby.bat respectively.
command to run tests: ./tools/bin/old.go.jruby -S rake --rakefile server/run_rspec_tests.rake spec spec_module=<module eg: helpers/api>